I got sick of driving my Hubsan mini quad into walls and damaging props, so I added a quadcopter to Electric RC Sim.
The Quadcopter features simulation of 4 motors, 3 axis gyros and PID controllers. It was fun to make and even more fun to fly. The release also includes a few other things such as updates for iOS 7.
If you haven’t downloaded it already, check it out. It’s still at the low low price of 99c.
If you have downloaded it, have you been able to flip the quadcopter yet? Hint: get it rocking then cut the power while it flips.